Ever since I ran the update last week (i also ran today's update and still the same problem), I've been having these issues. When I go to play a clip in the source window, i get the spinning rainbow for a couple seconds and then the clip plays. Then when i jump back to the timeline to play at any given point, I get the spinning rainbow again for a couple seconds again. This only started happening with the latest update. I've tried transferring all the footage to a different drive (thinking maybe the hard drive was having issues), but that didn't fix the issue. Its really starting to slow me down. Anyone else having these issues?